Pipe coupling



.Och 7 1924- w. H. FULTON PIPE COUPLING Filed April' 15 1921 Ilv I Patented Oct. 7, 1924.

UNITED STATES lenses raies.'

WILLIAM I-I. FULTON, OF IRVINGTON, NEW JERSEY, ASSIGNOR T0 TITEFLEX 'METAL HOSE CORPORATION, A. CORPORATION VOF NEW YORK. Y

Application filed April 13 1,921. Serial No. 461,060.

To all whom t may concern:

Be it known that I, vVILLIAM H. FULTON, a citizen of the United States of America, residing at Irvington, county of Essex, and State of New Jersey, have invented new and useful Improvements in Pipe Couplings, of which the following is a specification.

This invention relates to an improved fitting embodying means whereby the end of a hose or pipe may be secured to a union whereby the pipe may be attached to a terminal fitting or to another length of Y pipe, either flexible or stiff'.

The present invention is an improvement upon or modification of the couplings as set forth in my Patents No. 1,329,759 granted February 3rd, 1920, and No. 1,868,919 granted February 15, 1921, and involves a different manner of securing the hose tothe fitting.

The main object of the present invention is to provide improved means for securing the hose to the fitting. Y

Other and ancillary objects of the invention will appear hereinafter.

In the accompanying drawings which illustrate the invention- Fig. 1 is a central longitudinal section of a coup-ling and hose embodying the invention;

Fig. 2 is a side elevation of a portion of the coupling as will be hereinafter referred to; and

Fig. 3 is 4a section on the line 3-3 of eferring to the drawings, the tting comprises a body portion 1 havingya fluid passage 2 and a tubular extension 3 which is surrounded by .a sleeve 4 screw threaded at 5 to the body 1. To avoid leakage a packing ring 6 may be inserted between the end of the sleeve 4 and the fitting body.

Between the sleeve 41and the extension 3 is formed a chamber 7 which is in communication with the fluid passage. The conduit or flexible tube, as a whole, comprises a flexible tube 8 of rubber within which is a strengthening or reinforcing tube 9 formed from a helically disposed strip of metal having the edges of adjacent convolutions interfolded, there being clearances as 10 in the joints to permit flexing of the tube. The flexible tube thus formed of the rubber tube and the re-inforcing tube is passed through the fluid passage 2 and also lthrough the member 10 so asv to project some distance therebeyond as Ashown ,1nv

Fig. 1. j Y

The member V10V has projections 11 and L2 entering corresponding recesses in lthe extension 8 so as to beheld `against turn-` ing and further has an interiorly opening annual recess 13 which communicates by a slot 14 with its exterior surface. Y

Within the recess 13 is a coil of metal tape or ribbon 15 whereby the member 10 is gripped to the tube or conduit. Placed so as to come in contact with the end of the tube and alsoto overlap the eXtensionB as shown, is a rub-ber sleeve 16 of such size and'elasticity that when placed in position it tightly grips the end of the conduit and also the extension 3 so that a fluidv tight seal is formed between the conduity and the fitting Vhen lthe pressure of Y the fluid passing through the device -is increased, the sleeve 10 will be the more tightly held to' the conduit and to the fitting so that the tightness of lthejoint may be relied upon under all degrees of fluid pressure.

A flange 17 upon the member 4 acts as a stop, which positively prevents the sliding of the conduit too far to the right (see Fig. 1). Y

In assembling the conduit with the fitting, the hose is passed through the member 1 from which the member 4 is removed.

The end of the hose is passed through theV member 10 to a suitable distance, such as is indicated in F ig. 1. The end of the` ribbon 15 is entered within the slotv14 land the member 10 rotated about the conduit thereby coiling the tape upon itself as indicated in Fig. 1 and this process is continued until sufficient layers have been formed to produce the desired clamping force-upon the conduit. It will, of course, vbe 'understood that during this operation the conduit'will have been drawn through the member 1 to such an extent that the projections 11 and 12 will not engage with the extension 3. The member 10 having been thus'clamped to the conduit, the latter is drawn to the left (Fig. 1) so that the projections 11 and 12 are entered within the recesses in the eX- tension 3. The sleeve 16 is then placed in position as described, the packing ring 6 is placed in position and the sleeve 4 screwed home upon the body 1. l

It will now be seen that the member 10 clamped to the conduit preventsl its withdrawal to the left from the member 1, while the flange 17 prevents undue movement in the opposite direction; also that thek sleeve 16 provides a fluid tight joint between'ther fitting and the conduit which is the more securely held in position, the higher the pressure of the fluid transmitted. vllhile it is usually desirable to have the strengthen! ing tube 9 (io-extensive` with the rubber tube 8 in'ioider that the rubber tube may bere inforced against 'tensile strains., if the circumstances are such that this tensile'reiiiforcement-is not'necessary, the tube 9 may be replaced by a short ferrule,`collar or Asleeve substantially co-eXtensivewith the member 10,' and directly within it, so as to serve'` as a reinforcement ofthe rubber tube against the clamping'forceexerted by the ibbon coil 15.

Vilhile the invention has been illustratedin'what is considered itsy best application'y it may have other' embodiments without de- Y partin'gfron'i its spirit and is not, there# fore, limitedto theV structure shown'in the drawings.

Whatv 'l claim is 1j The combinationwith a fitting, having against thev pressure of said clampingmeans and a flexible sleeve surrounding said clan'iping means and 'engaging said tube and vlittingand forced thereagainst" by the fluid pressure of' said passage.

2. lfhe combinationlwith a fitting 'having Va fluid passage, of a tube 4extending there'- throughand means Vsecured to said tube for preventing its Vwithdrawal from' the fitting in one direction, an'outer sleevehaving 'a1 flange for limiting'the movementr of said tube through said fitting in theoppositedr' rection' and afe'iblel sleeve surroundingsaid means and enga ino'` said tube and fittin'` D b D and forcedthereagainst by the fluid pressure of said passage.

3. The combination with a fitting having a fluid passage, of a tube extendingtherethrough, said tube comprising-an outer flexible member and an inner metallic member,

means secured rto said tubefor'preventing its withdrawal, a flexible sleeve surrounding said means and engaging said tube and fitting and forced` thereagainst by the fluid pressure of said passage and means for preventing rotation of said tube with relation to the litt-ing.

l. The combination with a fitting having a fluid passage, of a liexible tube extending through said passage, a reinforcing means comprising a flexible metal tube for the interior-'of 'said tube, said iittinghaving atubu'laretensionA and a sleeve surrounding said'extensionnnd spaced therefrom to form a chamber and coi'nn'iunicatingwithi said passage, means clamped to""said"tube and adapted to engage the end of Vsaid extension to wprevent' withdrawal of the' :tube from the ittin'g and/a flexible sleeve engaging withA saidr tube and said eitension" and surround` ing said clamping means and adapted'to vbe pressed inore securely in' positio'n by the' pressure of' said passage, and ailange I upon thel first mentioned sleeve adaptedto limit longitudinal movement of said tube with relation'to said fitting in one direction.

5.The` combination with a fitting having a fluid passage, of a flexible tube-extending therethrough, said tube comprising -an outer member and an innerflexible metallic inein-` ber, said vmetallic Vmember reenforcingfsaid 'y deuibleftube, means securedto said tube for preventing its withdrawal froin'the fitting and a flexible sleeve surrounding sa'id v'means and engaging saidtubeI and fitting and foi-ced thereagainst by thei'flti'idpressure 'of said passage. I

6. 'The coinfbinationl with a coupling, having a'pa'ssagebf a hose'extendingftherein,`

comprising a flexible metal tube anda rub! ber' tube about the saine, means forsecuring said hose to Ysaid "coupling anda flexible sleeve bearing yagainst said coupling and' y rubber tube', said coupling having a chamber open to the pressure through said hose'and said sleeve adapted to be pressed against said hoseand couplingby said pressure to n'ialre a.tight `joint therebetween." Y

In testimony whereof Villvhave signed this specification this 5th day 'of April`1921'.'

wiLLiAi'i'r n; FULTON. 

